National Certificate Maintenance Management: Farming N4 Past Paper June 2019 PDF

N1000(E)(M30)H NATIONAL CERTIFICATE MAINTENANCE MANAGEMENT: FARMING N4 (4090524) 30 May 2019 (X-Paper) 09:00–12:00 No...

N1000(E)(M30)H NATIONAL CERTIFICATE MAINTENANCE MANAGEMENT: FARMING N4 (4090524) 30 May 2019 (X-Paper) 09:00–12:00 Nonprogrammable calculators may be used. This question paper consists of 8 pages. Copyright reserved Please turn over (4090524) -2- DEPARTMENT OF HIGHER EDUCATION AND TRAINING REPUBLIC OF SOUTH AFRICA NATIONAL CERTIFICATE MAINTENANCE MANAGEMENT: FARMING N4 TIME: 3 HOURS MARKS: 100 INSTRUCTIONS AND INFORMATION 1. Answer ALL the questions. 2. Read ALL the questions carefully. 3. Number the answers according to the numbering system used in this question paper. 4. Sketches and diagrams should be labelled and neatly done in pencil. 5. Write neatly and legibly. Copyright reserved Please turn over (4090524) -3- QUESTION 1 1.1 Name any FIVE factors that should be considered in the planning of a proper workshop with enough working space.  (5) 1.2 Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question number (1.2.1–1.2.10) in the ANSWER BOOK. 1.2.1 Tool used to loosen and tighten bolts and nuts: A Swivel socket B Extension bar C Pipe wrench D Open-ended ring spanner 1.2.2 Tool used for loosening and tightening pipes: A Monkey wrench B Screwdriver C Allen key D Ratchet 1.2.3 Tool used to cut internal threads in holes:  A Stock die B Square C Tap D Vernier 1.2.4 Tool measuring outside diameters: A Tap holder B Puller C Micrometre D Centre punch 1.2.5 Used for holding objects, cutting wire or crimping: A Tin snip B Shifting spanner C Hammer D Engineering pliers 1.2.6 Tool to cut or clean outside threads on a shaft: A Engineering square B Hack saw  C Taps D Stock die Copyright reserved Please turn over (4090524) -4- 1.2.7 Supporting the weight of a vehicle when work must be done underneath it:  A Floor crane B Trolley jack C Hydraulic bottlejack D Trestle 1.2.8 Tool measuring the specific gravity of electrolytes in batteries: A Battery charger B Jumper cables C Hydrometer D Hydraulic lifter 1.2.9 Can be used to install and remove bushings or bearings:  A Press B Power bar C Trolley jack D Rotor and super duplex oil pumps 1.2.10 Tool measuring electrical problems, volts, amps or resistance: A Spark plug B Oil meter C Hydrometer D Multimeter (10 × 1) (10) 1.3 Explain the steps of the sound test which is used to test the grinding stone for cracks before putting it on the bench grinding machine.  (5) Copyright reserved Please turn over (4090524) -5- QUESTION 2 2.1 Explain each of the following mechanical terms:  2.1.1 Internal combustion engine 2.1.2 Spark ignition engine (3 × 2) (6) 2.2 State FIVE functions of a piston in an internal combustion engine. (5) 2.3 Make a neat, labelled sketch of a connection rod and piston with rings and the big-end and small-end bearings. (5) 2.4 Identify the components A–E of the engine in FIGURE 1. Write only the answer next to the question number (A–E) in the ANSWER BOOK.  FIGURE 1 (5) 2.5 Give FOUR functions of a crankshaft. (4) QUESTION 3 Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'True' or 'False' next to the question number (3.1–3.10) in the ANSWER BOOK. 3.1 The Occupational Health and Safety Act, 1993, requires the employer to maintain all equipment as far as reasonably practicable, and a work environment that is safe and without risk to the health of the workers. 3.2 The worker may request the employer to inform him or her about health and safety hazards in the workplace.  3.3 Smoking in the workshop will be allowed within the demarcated areas. Copyright reserved Please turn over (4090524) -6- 3.4 Place a fixed fire guard around an open fire to prevent spreading of the fire. 3.5 Agriculture waste refers to waste generated by various farming activities. 3.6 All agriculture waste is recyclable.  3.7 Unwanted chemicals and unused pesticides can be disposed of at dumping sites. 3.8 ONE week's application of pesticide for spraying may be mixed and stored overnight in a container. 3.9 Check the power cords and extension cords of portable equipment before each use.  3.10 Emergency exits may be blocked with stored materials until the next inspection date. (10 × 1) QUESTION 4 4.1 Name FOUR reasons why it is important to use a welding helmet when welding.  (4) 4.2 Make a neat, labelled drawing of the SMAW process and show each of the following:  Slag  Weld crater  Arc length  Protective gas shield  Electrode core/wire  Flux coating  Weld angle  Molten metal  Electrode cable  Electrode holder (10 × 1) (10) 4.3 Name the welding code of a flat groove weld for a butt joint.  (1) Copyright reserved Please turn over (4090524) -7- QUESTION 5 5.1 A water pump is driven by an electrical motor which draws a current of 15 A connected to 230 V. The cost per unit is R3,50 and the pump operates for 10 hours per day 30 days per month.  Calculate the following: 5.1.1 Total power consumption of the electrical motor in kW (3) 5.1.2 Total operational cost of the pump per month (3) 5.2 Give FOUR reasons for the amount of resistance against the flow of current in a conductor. (4) QUESTION 6 6.1 On a setting-out drawing the scale is 1:100.  6.1.1 How many metres on the ground will 200 mm on the drawing represent? (2) 6.1.2 How many millimetres (mm) on the drawing will 15 meters represent on the ground? (2) 6.2 Choose the correct word or words from those given in brackets. Write only the word or words next to the question number (6.2.1–6.2.8) in the ANSWER BOOK. 6.2.1 Wind provides (ventilation/humidity) by two mechanisms: cross flow and pressure differential. 6.2.2 The (site plan/locality plan) shows the layout of the buildings in relation to one another and to other objects. 6.2.3 (Swelling of soil/Lack of paint) causes cracks in the walls of a homestead over time. 6.2.4 (Aggregate/Concrete) is a mixture of stone, sand, cement and water which is then allowed to harden.  6.2.5 (Face bricks/Stock bricks) do not require plastering. 6.2.6 The (1:2:3/3:4:5) method is use to set out the foundation digging. 6.2.7 The dimensions in millimetres for a standard concrete footing is (700 × 300/200 × 150). 6.2.8 Mortar joints must be finished off with a (jointer/joiner) to prevent water seepage. (8 × 1) (8) Copyright reserved Please turn over (4090524) -8- 6.3 Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'True' or 'False' next to the question number (6.3.1–6.3.8) in the ANSWER BOOK.  6.3.1 The purposes of external plastering are to increase the durability of a wall, to prevent penetration of water and to improve appearance. 6.3.2 Doors shouldn't give protection against wind and rain, but windows and the roof are essential. 6.3.3 Timber door frames have lugs on the outside which are built into the wall.  6.3.4 Hoop-iron lugs are nailed to the outside of steel frames and built into the wall. 6.3.5 Door frames are placed in position when the third brick course is laid on the damp-proof course. 6.3.6 A brick trowel with a 300-mm blade is used to scoop up and spread mortar over the brick course. 6.3.7 A bolster is a broad chisel used for cutting bricks and cutting chases in brickwork.  6.3.8 A spirit square, at least 900 mm long, can be used in any position to gauge horizontal and/or vertical planes. (8 × 1) (8) TOTAL: 100 Copyright reserved